Data storage system having flash memory and disk drive
US5860083A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Mar 14, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/311
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a data storage system using a flash memory unit and an HDD, the storage area of the flash memory unit is logically divided into a permanent storage area, a non-volatile cache area, which are used as cache memory areas of the HDD, and a high-speed access area. These divided areas are individually managed. The permanent storage area stores data which is used frequently for a relatively long time period. The non-volatile cache area is used as an ordinary cache memory area in which data, which is updated relatively frequently, is stored. The high-speed access area is a storage area to be used by, e.g. an operating system (OS) of a host system. For example, a swap file, which needs to be accessed at high speed, is shifted into the high-speed access area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.